US7291058B2 - Method and apparatus for improving media flow - Google Patents

Method and apparatus for improving media flow Download PDF

Info

Publication number
US7291058B2
US7291058B2 US10/819,728 US81972804A US7291058B2 US 7291058 B2 US7291058 B2 US 7291058B2 US 81972804 A US81972804 A US 81972804A US 7291058 B2 US7291058 B2 US 7291058B2
Authority
US
United States
Prior art keywords
media
flow
magnetic
conduit
hopper
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active, expires
Application number
US10/819,728
Other languages
English (en)
Other versions
US20040259473A1 (en
Inventor
Jack Champaigne
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics Inc
Original Assignee
Electronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Electronics Inc filed Critical Electronics Inc
Priority to US10/819,728 priority Critical patent/US7291058B2/en
Publication of US20040259473A1 publication Critical patent/US20040259473A1/en
Assigned to ELECTRONICS INC. reassignment ELECTRONICS INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHAMPAIGNE, JACK
Application granted granted Critical
Publication of US7291058B2 publication Critical patent/US7291058B2/en
Active legal-status Critical Current
Adjusted expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C11/00—Selection of abrasive materials or additives for abrasive blasts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C5/00—Devices or accessories for generating abrasive blasts
    • B24C5/08—Devices for generating abrasive blasts non-mechanically, e.g. of metallic abrasives by means of a magnetic field or by detonating cords
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C7/00—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts
    • B24C7/0046—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier
    • B24C7/0069—Equipment for feeding abrasive material; Controlling the flowability, constitution, or other physical characteristics of abrasive blasts the abrasive material being fed in a gaseous carrier with means for preventing clogging of the equipment or for preventing abrasive entering the airway
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C9/00—Appurtenances of abrasive blasting machines or devices, e.g. working chambers, arrangements for handling used abrasive material

Definitions

  • This invention relates to improving the flow of media in shot peening, blast cleaning, and similar equipment.
  • Iron or steel granules also called shot or grit
  • shot or grit Iron or steel granules, also called shot or grit
  • the efficiency of such equipment depends upon media flowing freely through the apparatus and impacting upon the workpiece being treated.
  • the flow characteristics of the media vary widely during operation of the equipment. Commonly, the media is directed against the workpiece and then collected and recycled through the equipment.
  • Such media materials are subject to magnetic remnance or memory which causes reduced flow capability because of the magnetic remnance or memory which causes reduced flow capability.
  • This invention reduces or eliminates the effect of this magnetic influence and thereby improves the flow characteristics of the media.
  • Media can become “magnetized” by a variety of methods, especially by impact with a surface. As this media is recycled through the machine during treatment of a workpiece, its remnace tends to increase and its ability to flow smoothly is reduced, sometimes to the point of complete blockage of the flow-regulating device or passages.
  • Other objects are also subject to magnetic remnance, the effect of which can be remedied by subjecting the object to an alternating electro-magnetic field available from, for instance, a coil of wire with multiple turns.
  • a coil is commonly referred to as a de-gaussing coil and is used extensively to de-magnetize objects, such as screwdrivers or pliers.
  • Degaussing works on the principle of application of a time-varying magnetic field initially at a sufficient level to cause magnetic dipole alignment. The magnitude of the time-varying magnetic field is reduced until the remnance is at or near zero.
  • the screwdriver one would insert the screwdriver into the center of the degaussing coil and slowly extract it. As the screwdriver is extracted, the influence of the de-gaussing coil is diminished, leaving the screwdriver in a de-magnetized state.
  • the media is briefly submitted to an alternating magnetic field provided by a degaussing coil for a sufficient period of time that the magnetic remnance is reduced to a low (near zero) value.
  • the magnetic field can either be applied to the media in bulk or can be applied to the media by continuously passing the media through the degaussing coil.
  • FIG. 1 is a schematic illustration of a typical shot peening or blast cleaning apparatus to which a degaussing coil of the present invention has been applied;
  • FIG. 2 is an illustration similar to FIG. 1 , but illustrating another embodiment of the invention
  • FIGS. 3 and 4 are microphotographs of media before and after treatment according to the present invention.
  • FIG. 5 is a view of a coil and a media container within the coil to illustrated bulk degaussing of the media pursuant to another embodiment of the invention.
  • a typical shot peening or blast cleaning apparatus is generally indicated by the numeral 10 .
  • Media is stored in hopper 12 and then directed through a suitable flow path or conduit 14 , which includes a regulating device, for example a fixed orifice 16 in an orifice plate 18 .
  • Typical size of the orifice 16 is, for example, 0.125′′ or 0.250′′.
  • treatment chamber 20 which includes, for example, a centrifugal throwing wheel (not shown) or a pneumatic blast nozzle (not shown), both of which are well known to those skilled in the art.
  • the media impacts a target surface for its intended application and is then gathered in and resubmitted to the hopper 12 through return line 22 .
  • a de-gaussing coil 24 is placed anywhere within the flow path.
  • a preferred, but not mandatory, location for the location of the de-gaussing coil is immediately above the regulating orifice 18 , as illustrated in FIG. 1 .
  • Other locations may be used and even multiple degaussing coils may be used at various locations within a single flow path.
  • An alternating current power supply 25 supplies alternating current to the degaussing coil, thereby causing the degaussing coil to apply a time-varying magnetic field to the media flowing through the flow path 14 , the average value of which is zero.
  • the maximum strength of the magnetic field increases as the media enters the coil to a maximum midway through the coil and then diminishes.
  • any alternating and diminishing magnetic field will accomplish the de-gaussing. For example, rotation of a small bar magnet could be employed which would present a magnetic field to the passing material and thereby cause the de-gaussing effect.
  • valve 23 replaces the orifice plate 18 and magnet(s) 26 and electromagnetic coils 28 .
  • Valve 23 is disclosed in U.S. Pat. No. 5,362,027, and is a normally-closed device restricting the flow of media caused by the influence of the permanent magnets.
  • Application of an electrical current to electromagnetic coil 28 located within the valve causes a cancellation or neutralization of the permanent magnetic field and thus flow is allowed.
  • the level of this signal determines the amount of net magnetic field and therefore the flow rate. When this level is set to achieve zero, or near zero, net magnetic field flow rate will be maximized.
  • the degaussing coil 24 may be placed in flowpath 14 at either the inlet or outlet (or at both the inlet and outlet) of the magnetic valve and is designed to overcome not only the magnetization of the media by impact and recirculation, but also due to the effect of the permanent magnets within the magnetic valve 23 if a coil is placed at the outlet of the valve 23 .
  • the de-gaussing can also be achieve by alteration of the neutral field current signal controlling the electromagnetic coil 26 within the valve 23 in a time-varying fashion. This can be accomplished by applying a complex electrical current to the coil 28 . Accordingly, instead of applying a steady-state field condition, a dynamic time-varying field, is imposed on the steady state magnetic field. The average value of this time-varying portion of the field is zero, and thus the combination of the steady-state signal and the time-varying signal operates similar to just the steady-state signal alone except the presence of the time-varying portion of the signal performs a degaussing function.
  • the steady-state portion of the signal is sufficient to provide the regulation of the flow rate of the media through the valve 23 , while the time-varying portion of the neutral field signal is sufficient to effect the degaussing action desired.
  • This technique has the advantage of not requiring an additional element such as the degaussing coil in order to achieve demagnetization.
  • a container 32 is filled with media into the system.
  • a container 32 is filled with media and placed within a coil 34 . Current is applied to the coil to degauss the media in the container. The media is then returned to the hopper 12 .
  • FIGS. 3 and 4 are microphotographs of fine steel shot media, before and after degaussing respectively. Magnetized media exhibit “stringing”, which is clearly present in FIG. 3 . As shown in FIG. 4 , the “strings” are absent from the degaussed media.
  • Tables 1 and 2 The effects of degaussing media are also illustrated in Tables 1 and 2. Table 1 sets forth data with respect to a fine powder steel media, and Table 2 sets forth data for an industry standard “cut wire” shot. In both instances, the degaussed media exhibited substantially greater flow rates than either the magnetized media (which had been used in production), and the virgin media which had not been used in production and which was magnetized only to that extent occurring naturally in the manufacture and shipping of the media.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Magnetically Actuated Valves (AREA)
  • Cleaning In General (AREA)
US10/819,728 2003-04-10 2004-04-07 Method and apparatus for improving media flow Active 2025-10-05 US7291058B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/819,728 US7291058B2 (en) 2003-04-10 2004-04-07 Method and apparatus for improving media flow

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US46184503P 2003-04-10 2003-04-10
US10/819,728 US7291058B2 (en) 2003-04-10 2004-04-07 Method and apparatus for improving media flow

Publications (2)

Publication Number Publication Date
US20040259473A1 US20040259473A1 (en) 2004-12-23
US7291058B2 true US7291058B2 (en) 2007-11-06

Family

ID=32869689

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/819,728 Active 2025-10-05 US7291058B2 (en) 2003-04-10 2004-04-07 Method and apparatus for improving media flow

Country Status (3)

Country Link
US (1) US7291058B2 (ja)
EP (1) EP1466700A1 (ja)
JP (1) JP4594640B2 (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160229030A1 (en) * 2013-09-20 2016-08-11 Jedo Technologies Method for recovering machining waste by input of energy and machining machine comprising a waste recovery system
US20190337121A1 (en) * 2016-04-11 2019-11-07 Abrasive Engineering Pte Ltd Control valve for shot peening

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103302563B (zh) * 2012-03-14 2015-11-25 富泰华工业（深圳）有限公司 打磨装置及使用该打磨装置的机械手
CN106826581A (zh) * 2017-04-07 2017-06-13 安徽理工大学 一种两级加速电磁驱动固液两相流形成磨料射流发生装置
CN107571162B (zh) * 2017-10-09 2019-05-07 安徽理工大学 一种基于直通螺旋混合电磁磨料连续射流发生装置
CN110576340A (zh) * 2018-06-07 2019-12-17 中国航发商用航空发动机有限责任公司 增材制造管件内壁表面处理装置

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1743057A (en) * 1928-03-23 1930-01-07 Albert E Wienholz Stone-sawing machine
US2224505A (en) * 1938-06-06 1940-12-10 American Foundry Equip Co Electric abrasive projector
US2678130A (en) * 1950-05-29 1954-05-11 Univ Minnesota Method and apparatus for demagnetizing magnetic ores having high coercive force
US2743554A (en) * 1952-04-19 1956-05-01 Int Resistance Co Apparatus for blast etching electrical devices
US2924911A (en) * 1959-05-07 1960-02-16 Wheelabrator Corp Blast finishing machine
US3609465A (en) * 1968-04-03 1971-09-28 Magnaflux Corp Magnetic particle inspection and demagnetizing apparatus
US3778678A (en) * 1972-02-16 1973-12-11 S Masuda Apparatus for electric field curtain of contact type
US4463502A (en) * 1982-03-08 1984-08-07 Fitzgerald Thomas J Magnetic distributor-downcomer for fluidized beds and magnetic valve to control the flow of solids
US4680900A (en) * 1983-07-08 1987-07-21 Jost Wadephul Device for accelerating an abrasive
US20030153249A1 (en) * 2002-02-13 2003-08-14 Motohisa Aoki Surface roughening treatment method of object being treated, and apparatus therefor

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1084496A (en) * 1965-06-15 1967-09-20 British Steel Castings Res Ass Improved method of and equipment for shot-blasting and the like
US5362027A (en) * 1993-11-12 1994-11-08 Electronics, Incorporated Flow regulating valve for magnetic particles
DE19605546C2 (de) * 1996-02-15 1998-04-16 Karl Heinz Kies Verfahren und Vorrichtung zum Abscheiden abgestrahlter Teilchen aus Strahlmitteln
US5971835A (en) * 1998-03-25 1999-10-26 Qed Technologies, Inc. System for abrasive jet shaping and polishing of a surface using magnetorheological fluid
JP2987703B1 (ja) * 1998-09-28 1999-12-06 日本磁力選鉱株式会社 使用済みブラスト材の再生方法及び設備
JP2001284124A (ja) * 2000-03-30 2001-10-12 Sintokogio Ltd 磁性粉粒体の脱磁方法及びその装置

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1743057A (en) * 1928-03-23 1930-01-07 Albert E Wienholz Stone-sawing machine
US2224505A (en) * 1938-06-06 1940-12-10 American Foundry Equip Co Electric abrasive projector
US2678130A (en) * 1950-05-29 1954-05-11 Univ Minnesota Method and apparatus for demagnetizing magnetic ores having high coercive force
US2743554A (en) * 1952-04-19 1956-05-01 Int Resistance Co Apparatus for blast etching electrical devices
US2924911A (en) * 1959-05-07 1960-02-16 Wheelabrator Corp Blast finishing machine
US3609465A (en) * 1968-04-03 1971-09-28 Magnaflux Corp Magnetic particle inspection and demagnetizing apparatus
US3778678A (en) * 1972-02-16 1973-12-11 S Masuda Apparatus for electric field curtain of contact type
US4463502A (en) * 1982-03-08 1984-08-07 Fitzgerald Thomas J Magnetic distributor-downcomer for fluidized beds and magnetic valve to control the flow of solids
US4680900A (en) * 1983-07-08 1987-07-21 Jost Wadephul Device for accelerating an abrasive
US20030153249A1 (en) * 2002-02-13 2003-08-14 Motohisa Aoki Surface roughening treatment method of object being treated, and apparatus therefor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160229030A1 (en) * 2013-09-20 2016-08-11 Jedo Technologies Method for recovering machining waste by input of energy and machining machine comprising a waste recovery system
US11000936B2 (en) * 2013-09-20 2021-05-11 Jedo Technologies Method for recovering machining waste by input of energy and machining machine comprising a waste recovery system
US20190337121A1 (en) * 2016-04-11 2019-11-07 Abrasive Engineering Pte Ltd Control valve for shot peening
US10882159B2 (en) * 2016-04-11 2021-01-05 Abrasive Engineering Pte Ltd Control valve for shot peening

Also Published As

Publication number Publication date
EP1466700A1 (en) 2004-10-13
JP2004314297A (ja) 2004-11-11
JP4594640B2 (ja) 2010-12-08
US20040259473A1 (en) 2004-12-23

Similar Documents

Publication Publication Date Title
US7291058B2 (en) Method and apparatus for improving media flow
Kim et al. Simulation for the prediction of surface-accuracy in magnetic abrasive machining
JPH07501268A (ja) ブラスト装置と方法
US4306386A (en) Method of finishing ferromagnetic articles by ferromagnetic abrasive powders in magnetic field
US10882159B2 (en) Control valve for shot peening
US3406704A (en) Flow regulating valve for magnetic particles
CN109333369A (zh) 降低热板抛丸处理后表面粗糙度的方法
US2996863A (en) Demagnetization system for magnetizable article packager
JPH0116623B2 (ja)
US2365948A (en) Abrasive supply system
CN208019908U (zh) 一种用于钕铁硼无心磨床的轴料自动上下料装置
US11768089B2 (en) Adaptive magnetic field cancellation
US2177809A (en) Apparatus for magnetically separating materials
CN110067522A (zh) 一种可自动化调节的新型磁选分离系统及方法
Pinkerton Quench rate dependence of the initial magnetization in rapidly solidified neodymium-iron-boron ribbons
KR102128617B1 (ko) 다중 탈자기 전자칩 호퍼
Morgan et al. The selection and application of magnetic separation euipment. Part I
MX2013014527A (es) Procedimiento y dispositivo para la separacion de una primera sustancia a partir de un flujo principal de sustancia fluida y unidad de control y/o de regulacion.
DE3611845C2 (ja)
Roben Magnetabrasive finishing: a method for the machining of complicated shaped workpieces
CN207239872U (zh) 一种磁性材料旋转成型加工装置
JP3013806U (ja) 粉粒体材料除鉄装置
EP0111059A3 (en) Method and apparatus for measuring flow-rate of electromagnetic granular media
CN86100458B (zh) 永磁脱磁装置
Kong et al. A study on the method with electromagnetic field for improving the removal efficiency of radioactive corrosion products

Legal Events

Date Code Title Description
AS Assignment

Owner name: ELECTRONICS INC., INDIANA

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHAMPAIGNE, JACK;REEL/FRAME:019890/0592

Effective date: 20070924

STCF Information on status: patent grant

Free format text: PATENTED CASE

FPAY Fee payment

Year of fee payment: 4

FPAY Fee payment

Year of fee payment: 8

MAFP Maintenance fee payment

Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YR, SMALL ENTITY (ORIGINAL EVENT CODE: M2553); ENTITY STATUS OF PATENT OWNER: SMALL ENTITY

Year of fee payment: 12